A 61-year-old woman is diagnosed with osteoarthritis (OA) in her left wrist. Which of the following is first-line pharmacologic treatment for OA?

Choice A reason: Nonsteroidal anti-inflammatory drugs (NSAIDs) are considered first-line pharmacologic therapy for osteoarthritis. They reduce inflammation and pain by inhibiting cyclooxygenase enzymes, improving joint function and quality of life. Choice B reason: Corticosteroids may be used in intra-articular injections for moderate to severe OA with localized inflammation, but they are not first-line systemic therapy due to side effects and limited long-term efficacy. Choice C reason: Duloxetine is approved for chronic musculoskeletal pain and may be used in OA patients with comorbid depression or central sensitization, but it is not first-line for isolated OA. Choice D reason: Opioids are reserved for severe pain unresponsive to other treatments due to their risk of dependence, sedation, and other adverse effects. They are not recommended as first-line therapy.